The average occupancy rate is north of 90% and that is not a sustainable rate.

Would love to put a couple sustainable, modular homes here and rent short term.

FHA will count income from duplex, but triplex and quad have sustainability requirements that would be a unicorn find in San Diego.Good luck 

there is a lot to furnishing and STR... not only furniture but all the dishes, small appliances, linens, glasses, wine glasses etc..2. 

We work with a lot of midterm rental investors as clients and as consulting clients in Denver and Colorado Springs, and I think there are a few things to consider: do you want to pay for furniture?

Because there are a lot of ways to do that, but it needs to be something you are passionate about, otherwise it isn't sustainable. 

STR's have mortgage, prop mgmt, ins, vacancies, repairs, water, electric, wifi, licensing, furniture, toiletries, snacks, cleaning fees, hotel tax, sales tax, etc.

Looks like you'll have the be loose with how your construction is "life-sustaining" from my very brief read and elementary understanding of how this works.

Therefore, if you have a reliable handyman that can lay tile, flooring, minor plumbing items such as replacing faucets, build furniture to set up a property, please let me know!

I wouldn't bet the farm on anything more than 10-20% before a plateau or correction, as the jobs/wages here may have a tough time sustaining anything more than that