For example reminder to replace HVAC filter every 3 months, to ensure pets are vaccinated yearly, to ensure tenant sends me copies of renewed vehicle registrations and insurance etc.

I spent a week there last month just getting familiar with the city and neighborhoods.  

Nothing was more evident than going to the mastermind earlier this month where you had people new to real estate talking and building relationships with people who have been in the industry for years.

If anyone is looking for contracting services in the Orange, Riverside, and San Bernardino Counties, give our company Reliable Construction & Doors a look.

Now it should cost an arm and a leg, but I wouldn't necessarily go for Joe blow, "I'll do it for $200" either, or you'll be getting a call in about four months because all the refrigerant has run out your lines.Is it one outdoor unit and 2-3 heads?

The slowest months are Sept - Oct.  

What should I do with the first mortgage lender ( senior lien) that is going to foreclose at the  property next month.

Buy with seller financing with terms that allow a 48-month principal payment of $150,000 and you've achieved your first question.

The Investment I’m looking at is a  3 bed 1 bath and has a really nice already running Airbnb 1bed/1bath guest suite that generates an average of $1500/Month.

With rentals - it's cash flow every month for as long as you own it (presuming you find a good rental that cash flows - which isn't the easiest thing in today's market.)Know that you are coming into a high market - both real estate and money are expensive right now.