Unless your plan is exhaustive enough that you have every single line item covered and you can create accountability for each contractor who steps foot onto the project, you're bound to face bottlenecks with this approach.

Most Lenders I know won't even consider transacting with a "private party" without a significant amount of vetting-- to the point of exhaustion, even.  

These are just a few things you can start with and is no way an exhaustive list.

Over four units and once you've exhausted your 10 Fannie/Freddie loans (each of you can have 10, provided each has income to qualify and owns the property only in their own name) you're into commercial loans. 

This is not an exhaustive list, but hopefully a good start. 

We do not want to exhaust all our cash reserves..

In addition, if the depreciation deductions have been exhausted, it might make sense to 1031 exchange and move on to another property.

I suppose every county calls their tax assessor/collector by a different name.Mine, which is a small county, has an exhaustive website that even includes legal notices and tax lien information.I don't know Tampa, but that's where I'd start.

I don't know how much you have saved up but know that once you purchase this investment and if it exhausts your savings, its going to be a long while before you can save to purchase another one.

Im not sure if they make an exhaust fan rated for a shower (wet area) but if they do, you could install one but this might mean adding a second one to the room.