I have been considering reaching out to the seller to see if they are still interested in selling the property and just this week I found a Facebook marketplace posting from the seller trying to sell their home off market because “it became too much for her to maintain alone”. 

And I don't think anyone else will be able to get a loan if you decide to sell it in the future - which obviously impacts its value.Yes, you can do Conventional, FHA, VA, and USDA loans to purchase existing or new manufactured homes. 

You wont pay capital gains when you sell the house as long as it is in the SDIRA but you will have to pay normal income tax when you withdraw cash from the SDIRA after retirement but would you rather pay income tax on $90K or $300K?

New construction does not seem to make sense whether you keep it as a rental or build to sell. 

Raise the $600K, do the pre-development work, then “sell” the property to NewCo.  

But inflation for sure with hot Austin market and ice storm displacements.I am also remodeling a Lake House in Belton, Texas that we will likely sell, but I really thought MTR might do really well. 

While it is a super nice home and seems like a great price to many of us, if you decide to sell, what is your pool of buyers? 

There are people who buy a longer term (12 months or more ) OPTION giving them a RIGHT to purchase a subject property, at a certain price, within a certain amount of time, and attempt to either sell the option for a higher price or close on a simultaneous purchase and sale to an end buyer paying a higher price.  

If you live there 2 years or more before selling you will be exempt from tax on the 1st $250k in profit which is a nice bonus. 

Another option is to sell one or two of them to pay off your LOC and then keep just one.