I think the only immediate problem is if one were to get carried away and put too much money into their ADU and plan on selling soon.David thanks.

And you can't legally dictate how much they carry for personal belongings. 

Why not joint venture with someone who has money, fix & flip itWhy not rent it out for at least the monthly carrying costs.Why not sell it on a lease option, get 10% cash up front to fund school? 

He sells you his house for his basis $323k carries the note.  

He is renting the unit and will carry a bit of debt for a couple years but once he is clear of that he will do very well for himself.Park owners want their empty spaces filled. 

When you add purchase price, carrying costs for at least 6 months, materials, labor, real estate agents costs and taxes, do you have at least a projected 10% profit?

Procrastination will only cost them more. yep. carrying costs alone, but also if its not your money and investor money - some will try and drag it out. 

These loans are quick and align well with your goal of selling within the year...just watch for carrying costs.For Home 2, the $210K mortgage complicates things a bit, but it’s not a dealbreaker.

Hard money loans offer fast approval and don't risk personal assets but come with high-interest rates and fees, which can be tax-deductible as carrying costs.

Additionally, they have another property which has appreciated in value, carries low interest rates, but has negative cashflow and essentially feels like it just locks money away.