This is the low end of a hands off ADU other than converting existing living space.The more sophisticated value add people are still leveraging non-optimized zoning. 

And then "intend " to pay me the back the owed rent couple hundred $$ every month after they move out next weekMy question is the security will cover $2050 of $3130 owed, how to I work on collecting the remaining portion?

How has rent collection been?

We have a summer rental and are unsure if we will be able to collect rent To cover our expenses.

I wish that you are all well, staying safe and still collecting rents in these interesting times.

The lease is standard boilerplate claiming both individually and collectively responsible for the rent.

So, not knowing IF or WHEN I might get those funds, am I able to collect unemployment in the meantime?

If tenants have not provided rent and/or deposit with terms of lease prior to start of lease date, then you may not be obligated to allow them to move in.If you allow them to move in and they cannot pay the rent then you may end up not collecting for 3 to 6 months or longer.I would have them resubmit an application for May 1st and evaluate based on the new application.

You're better off investing in a market that you have a strong chance of achieving your goals than to buy in a sub optimal market just because you can drive by and see your property.

Just fixing the triplex up and collecting rent there would be plenty over mortgage while repairing the single unit.