Your best/safest bet would be a regular lease combined with an option to purchase.

Yes the Class feature Cost a bit extra which is a bummer bet the support for it is amazing, and it is easy to allow access for Tax Accountants to pull the reports they need rather than my clients playing middleman. 

Usually its a safer bet.

Quote from @Brandon Foster: Hello Ryan,STR is do able in the north county area but there are a lot of rules and regulations.The city of Oceanside right now will not allow anything STR unless it’s west of pacific coast hwy.This is changing a lot too so you need to be aware of that in your plans.Carlsbad is super strict too but there are some condos that are still available to do STR in.Medium term rentals are as safer bet but way less profitable.

You're best bet is to call a few brokers local to the area and see what they can come up with.It's definitely going to be a surplus or excess carrier that will do it and the premiums will be high. 

Typically, you can only do one rollover per 12-month period (again, IRS Publication 969 has the details).In the end, having the option to invest your HSA funds is usually a better bet than letting them sit in a basic savings account.

Again, knowing nothing about this particular company, my bet is that type of company will require money up front just to consider whether they can help you out.  

I'm betting he'd drive to that area.

I’m not a betting man.

Your best bet is to get on the phone, get multiple opinions, multiple quotes, and make decisions on the type of build before pulling the trigger.