…They simply have to buy as much or more than they sell for (after closing costs) and reinvest all “cash” they receive. 

The input costs for operating a STR are a multiple of what they were even 5 years ago.  

Wouldn't that effectively shunt the alter ego case?

You don't want to be starting this process over on August 1.Second, the New Mexico court will award you monetary damages for your unpaid rents, court costs, etc.

Additionally, I'd appreciate any tips on balancing cost-effectiveness with durability.

Finding cash flow in Denver is going to be very hard without making a massive down payment or house hacking, which would be GREAT if you can do that effectively. 

i would consult with attorney and CPA for your specific scenario . the same thing may effect everyone differently pending their financial position 

My costs will be minimal.

We are now seeking advice on how to protect our assets while owning the properties in our own names, without incurring excessive costs that could lead to negative cash flow.We are open to exploring creative solutions that strike a balance between asset protection and financial stability.

Recently we've found seller(s) to be increasingly receptive to concessions of up to $20k towards buyer(s) closings costs.