The best strategy in Mexico is holding short-term rentals and it's often even better than in the US because of the high cash flows and the almost guaranteed lack of regulations, which is a huge problem in the Us another developed countries.

So you'll have to show that you've made the payments on time for 12 full months (cancelled checks or bank statements to evidence debits on your bank statement to show payment).The 12 months of payment documentation will be required from the underwriter as a condition almost guaranteed 99.999%.Keep in mind what I am talking about here is if you pay an underlying mortgage that you're not obligated on and after the 12 month of payment you are "no longer," subject to the 50% LTV restriction with conventional financing.

There's a lot of value (even if a higher interest rate) to us finding a simple deal like this...We have great credit and solid income - I would think, for the right rate, there would be lenders out there jumping at the chance for these guaranteed returns - we'd even consider putting up the equity of the Texas home (and obviously the land itself) to secure some portion/all of the loan?

Quote from @V.G Jason: If your debt is 8%, and you are paying it down that's your guaranteed rate of return.

I know with a house hack it would cost less upfront to start but will guarantee a negative cashflow the first year.

From the folks I have talked to that have, they are their easiest tenants and guaranteed money. 

The 2nd reason to stay away from park owned homes, is that you lose the advantage of the MHP, which is essentially a trapped tenant, because they own their house, and they cannot move it, you have a guaranteed renter. 

It's a simple form and a few Docs that they require  prior to the fee request and Paying the fee obviously doesn't guarantee that they will approve the deal. 

That all depends on what promises or guarantees where made and what the contract says.

They provide a guarantee and come back out if I catch something in traps that are in locked spaces to find out how they got in and fix the problem.