Also, C and B class properties aligned with my beginners budget of $20k-30k including closing costs and rehab. 

Without detailing each component too much, the first two elements are often combined into one affair: mutual consent.

In the end we had to make numerous structural repairs because of hidden waterlogged structural components.

I believe we can align on your questions!

I've been spending a considerable amount of time researching the tax deed sales process in Florida, and although I'm starting to feel a bit more knowledgeable and comfortable with the process overall, there is still one component that really scares me- title searches.

There may be structural components that have to be upgraded.

While a SFR and a 200 unit apartment are not the same, there are components that are similar.  

Most of the homes have had just about all of their major components upgraded at some point so I wouldn't consider them a money trap per say.

For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

Are you familiar with this component of the redemption period?