Greetings & Welcome!
I spent $750 for my van (1973 Dodge Travco high top, gutted), and $300 for the conversion (much of it re-used, recycled, repurposed, or free).
I was not actually trying to save money, my aim was for practical, reliable, comfortable, and full featured, which I fully accomplished. I’ve lived in this one comfortably for over 10 years now.
Previously I have had many rigs, and with only one exception, never spent over $2500 on any of them. Most were ready to go with no conversion necessary. Prior to semi-retirement, I didn’t have much time to do build outs, and had not yet discovered my current method of just moving my furniture in and securing it. Portable and/or modular has a lot of advantages, and house style furniture is more comfortable and cheaper than RV type stuff.
"With age and experience comes wisdom and knowledge." ~ RoadWise