Even if you plan to hold the property for 10, 15, 30+ years, you will likely refinance at some point in the future to pull money out, so I wouldn't be too concerned about NOT choosing the 30-year mortgage. 

Then you need to know what loan to value you can pull out of the property.

Property has a lot of upside in terms of appreciation and with it needing mostly cosmetic work, we are able to BRRRR and pull out a decent amount of our initial investment (which came from private money, HELOC and personal).

Rent o meter can be good, another option is to watch Zillow and pull off what landlords are asking for rent.

What website do you use to pull a background check?

If you don't have access, have an agent friend pull how many leases were in the area over the past 18 months.  

So every dollar we deposit is swept directly towards our remaining balance, lowering interest cost and increasing our line available to pull from.

When you refinance, you'll only be able to pull out 75-80% of the equity, which is the same whether you occupy the property yourself or not.

Sometimes it's as simple as pulling a permit.

My concern is that it may be too soon to try to pull equity from the home.