Some background - the wife and I are considering an 02-03 LC/LX470 for doing some cross country towing. Camper would be max of ~3600lb loaded, with brakes, of the fiberglass variety (www.escapetrailer.com), so not as aerodynamic as a boat or popup camper. We'd like to be able to carry 3-7 people on such excursions. Based on my research, it doesn't sound like an LC/LX470 would break a sweat with this usage. The durability of the platform goes without saying, and is a big part of my interest in this vehicle. I am mechanically inclined, with a history of Jeeps and turbo vehicles; my renewed interest in the Toyota brand is after my friends and I have had some success racing an 1989 Toyota Cressida powered by a 1UZ V8. Well, I should clarify, our racing hasn't really been successful, but I've been impressed by Toyota engineering 
We are limited by budget, which is why we're pretty much limited to the 02-03 range. 03's seem to be harder to come by in our range but it would be nice to have with the 5spd auto. My 2nd vehicle choice is a 4th gen 4Runner with the V8.
My two main concerns are reliability and fuel economy.
1) Reliability - the platform itself has proven itself durable - but the vehicles we are considering are 10 years old. Assuming decent maintenance, I'd assume the core mechanicals won't cause us problems. Also, I don't know the exact values, but in North America, the production numbers aren't all that high; I worry finding parts and/or people with experience working on these vehicles could be a problem. I'd like to avoid financing a newer vehicle, but if that results in taking on an SUV that would become a headache... I may reconsider. Of concern are some of the tidbits that are rare but important (ie LX's Nav/HVAC display, AHC, AVC, etc). None of these will leave me stranded most likely, but I'll definitely need to repair in the event of problems.
To the point - will upkeep, maintenance, repairs become a burden?
2) Fuel economy - these vehicles get horrible mileage, this isn't news. I believe ratings are 13/15 MPG. However, it seems the more economical tow vehicles we would consider otherwise (Toyota 4Runner, Highlander, Honda Pilot, etc) get 17-22 MPG under normal usage and 10-16 MPG when towing (and closer to the former number under the worst conditions). I believe the LC/LX470 economy won't decrease to the same percentage when used for hauling. Number-wise, it seems the newer, lighter vehicles get 30-50% worse mileage when hauling. If the LC/LX get 30-50% worse mileage when hauling, we are talking 7-9 mpg potentially. If I put a lot of miles under my belt in 10 years, the savings in fuel alone would justify purchasing a more expensive, economical vehicle. There is a lot of data available on the newer/economical vehicles, but I haven't found as much information on the LC/LX's.
Any feedback on the fuel economy while towing?
Thanks in advance for any information and advice.
Brian

We are limited by budget, which is why we're pretty much limited to the 02-03 range. 03's seem to be harder to come by in our range but it would be nice to have with the 5spd auto. My 2nd vehicle choice is a 4th gen 4Runner with the V8.
My two main concerns are reliability and fuel economy.
1) Reliability - the platform itself has proven itself durable - but the vehicles we are considering are 10 years old. Assuming decent maintenance, I'd assume the core mechanicals won't cause us problems. Also, I don't know the exact values, but in North America, the production numbers aren't all that high; I worry finding parts and/or people with experience working on these vehicles could be a problem. I'd like to avoid financing a newer vehicle, but if that results in taking on an SUV that would become a headache... I may reconsider. Of concern are some of the tidbits that are rare but important (ie LX's Nav/HVAC display, AHC, AVC, etc). None of these will leave me stranded most likely, but I'll definitely need to repair in the event of problems.
To the point - will upkeep, maintenance, repairs become a burden?
2) Fuel economy - these vehicles get horrible mileage, this isn't news. I believe ratings are 13/15 MPG. However, it seems the more economical tow vehicles we would consider otherwise (Toyota 4Runner, Highlander, Honda Pilot, etc) get 17-22 MPG under normal usage and 10-16 MPG when towing (and closer to the former number under the worst conditions). I believe the LC/LX470 economy won't decrease to the same percentage when used for hauling. Number-wise, it seems the newer, lighter vehicles get 30-50% worse mileage when hauling. If the LC/LX get 30-50% worse mileage when hauling, we are talking 7-9 mpg potentially. If I put a lot of miles under my belt in 10 years, the savings in fuel alone would justify purchasing a more expensive, economical vehicle. There is a lot of data available on the newer/economical vehicles, but I haven't found as much information on the LC/LX's.
Any feedback on the fuel economy while towing?
Thanks in advance for any information and advice.
Brian