Sounds like exactly what we did last year, had about $15K to spend at the outside.
Decided on the OB Eagle and looked everywhere for those, particularly wanted the 2000 model as they still have the large section chassis and draw bar. (Had a bad experience with the old camper shearing off one side of the draw bar just outside Kaimkillenbun heading to Lightning Ridge.)
Found one and got it for $13.2K, but had to do a few things.
Someone had smashed the stove glass top off by not putting it down and pushing in the back end bed. Unfortunately there are no parts any longer available for these stoves and I had to fabricate the new hinge bracket and get a sheet of glass cut and toughened and bond it to the bracket to make a new one as you can't get your safety cert without it and I couldn't afford $1500 for a new stove.
The Jayco power supply was in working order but the battery was swelled and had to go, I ended up pulling out the Jayco stuff and rewiring all the DC and upgraded the RCD and incoming 240 socket etc. (yeah.......licenced lecky and fitter and turner so a bit handy for mods)
Also the fridge didn't work on any of the 3 power options, even though it was ice cold on gas when I looked at the camper at the guys place, still can't figure out how he pulled that off.
Turned out to be the combined 240V/Gas thermostat on the fridge, apparently it's common that if the thermostat dies for the gas or for the 240V it won't work on either.
Also had one broken spring hanger, needed brake shoes, new tires, tail and marker lights and new car plug.
All up on top of the $13200, I did most of it myself except the brake shoes and the spring hanger as the caravan crowd that were doing the safety cert did those while they had it, it cost me another $3000 including a 180 watt removable solar panel and 3000 watt inverter, charger etc. SO total about $16200, and an very happy with the price and result.
Only one thing that still worries me and I haven't done yet, apparently the 2000 model was renowned for the center roof seal strip that runs full length of the camper roof to leak as Jayco didn't use enough sealant on them and if they are stored outstide they leak and wreck the inside of the roof, was quoted $1500 to redo it but apparently it's an easy fix but very time consuming to remove all the old sealant..............one day.