maybe just me, dont go cheap on TP. you can buy inexpensive, but make sure it doesnt feel cheap. its worth an extra couple of dollars so guests dont remember that everything felt cheap

Typically how  much extra should I budget for, for these unknowns? 

Maybe they want bigger lot, more land, extra lots. 

But, understand they will all have slightly different pricing as well, and when you "layer risk" rates/terms go up. 

While I am extra nervous I am trying to make this an investing opportunity and decided to house hack or buy a place to rehab which I can later rent - let’s see how the DC market treats me.Suerte a todos y un placer ! 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

Just keep in mind that condos still have HOA rules and fees, which can sometimes limit rental options or add extra costs.

Find you an agent with a team behind him of solid general contractors, lenders, and property managers as well as other necessary contacts that will make navigating the best neighborhoods for solid rentals that will help you achieve what your looking for (Under $180K for SFH and/or a duplex, cashflow, and $1500 - $2000 in monthly rent) Here is one extra bonus to add into the mix for your criteria..

As you know bedrooms are worth more to appraisers than an extra living room.

However, it can come with extra costs for setup, maintenance, and potentially higher interest rates on loans.