The interest rate on a HELOC or Heloan may be better than the personal loan. 

It's definitely possible to get a loan as a foreigner but the rates will be high(er) and the downpayment required will be as well.

As tourism grows, seemingly so does demand and nightly rates.

It's always worth comparing rates and terms, as some lenders might be more aggressive with loan-to-value ratios, depending on the location and property condition.

If he owes a decent amount on the property, wouldnt the conventional route make him lose whatever interest rate he has?

Although the Joshua additional demand is smaller, it is closer to DFW, which means its rental rates will be higher. 

If they want to stay, they will sign a new one-year lease with a monthly rate of [$XXXX].

The best scenario for the buyer buying subject to is to have enough money and good enough credit to qualify for a new loan at current rates should the due on sale clause be invoked by the lender  

They already lost some major players due to the state capping rates https://www.foxbusiness.com/lifestyle/california-insurance-c... will all insurance companies stop coverage, raise rates or reduce what they cover?

Look, we’d all like to search the internet, find a deal for sale, analyze the property as having a great cash flow at current interest rates, with lots of upside potential in a gentrifying market.