resurfaced garage floor. new paint interior and exterior.

Typically what I've seen is a bedroom on a 3rd story requires 2 means of egress with one being an interior staircase leading to multiple means of egress in other parts of the building, and the other being an exterior staircase or fire escape type situation. 

@Yvonne P.Also, remember, you typically do not get to see the interior of the properties so the risk profile is significantly higher

From the few interior pics, this house needs A LOT of work to be STR worthy.

Replaced floors, landscaping, interior / exterior painting and minor electrical updating What was the outcome?

I understand that there are some rules of thumb for other property types (1-2% of home value/year), but as common area maintenance is handled by the HOA, I’m not sure what number I should arrive at for non HOA items, like interior/AC repairs.

For personal LOC options, I have two with credit unions: (1) Interior Federal Credit Union - $25,000, (2) Pennsylvania State Employees Credit Union ("PSECU") - $20,000. 

@John Woodhouse and @Andrew Freed I have updated the post on my profile and added an exterior photo, no interior photos yet. 

We want to allocate the whole renovation budget to interior & exterior amenities & improvements, rather than having to replace roofs, repair old plumbing, bring electrical up to code, etc. 

3. i need advice on how to best make the interior of this old house look nice and modern.