Start by serving proper notice of the management change and request payment details.

The members here on BP that talk about STR auto-run systems didn't install those systems and find dependable cleaners & handymen overnight.

You said public water was available...would the lots require a septic system to be installed or is public sewer available? 

According to your profile, you'd be a representative of a Mexican real estate agency I'd never heard of, even though I've been investing in Mexico since 2017 so I googled the name you give and, surprisingly, I didn't find a proper website, just an influencer-like Instagram account.

“I’m literally the nation’s leading expert in tax liens and tax deeds,” he boasts in one installment.

On the other hand I don’t want to be cheap and losing money in the long run bc I’m not properly fixing things.

We pay $850 for a WH install, so, that seems high but you are in CA.

If they're delinquent after only 2 months, they're either facing sudden life changes or you did not properly screen them to begin with.

The Lender changes the loan to installment once they pull credit report for your seller, and omits it under 5102.4 guideline as paid by third party owner of prior home.

For property management, I am personally a fan of managing your first property (with proper education or mentorship before beginning) since this is where you will learn first hand what is required in managing a tenant.