Our agreement has exit of one partner can buy at 8% discount if other partner wants to sell but is not obligated to buy.  

These bookings need to be from different guests (not the same guest back-to-back) and at full market price, as opposed to discounted stays for friends.2.

BRRRR is a strategy to buy distressed properties at a discount, renovate them, and refinance them based on the new value.

Additional question would be, can the SMLLC build the house at a discount (taking losses for the business)?

DST's have their place and purpose but are not the end all to be all investment.You need to still make sure the deal is sound and if you need to exit the DST is it allowed later and at what discount would you need to sell off your shares.   

If you know what you're doing it can be a good way to acquire discounted properties.

The key to a BRRRR is buying deeply discounted properties and/or adding significant value through renovation.

Infill lots in the city or recreational lots in the rural areas.. either way you need to buy them at deep discount to make this work. 

I have a couple timeshares i bought at a tremendous discount.

In fact if you start discounting vacancy, cap ex, insurance, taxes, etc.