Tips for setting up payment plan to sell trailer

[Aaron Reamer]

Hey community! I've had great tips and advice before on here, so we are giving it another go. 

We're selling a trailer in Colorado, asking price is 45k in a trailer park. There is a lot of interest in this, but no one can come up with the asking price. Someone offered us 50k with 15k down, and a 2 year payment plan. We like the idea but we want to come up with a counter offer that will save us from paying too much in taxes and maybe procure more profit in the end. 

Neither of us has ever sold a trailer before, and are interested in some advice from someone who has done this before. Can we charge interest? What sort of contract do we need to get? Should we carry the title, so if the buyer defaults we keep the trailer? 

Hope to hear back from you geniuses soon! 

All the best-

Aaron