The best numbers here are usually on value add deals but depending on your build costs new construction may be an attractive option. 

A lot depends on whether the current tenants have written or verbal leases, whether they're year or MTM, your strategy for getting it rented if the current tenants leave, etc.

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23DSCR lenders generally let you vest either individually or as an LLC.

Well I think it is all dependent on the deal.. if the house hack ends up having better cash flow than the BRRRR after the refi, it might make more sense to house hack.

Really depends on how much you're looking to spend.

How much should someone increase their prices after adding such amenities or does it vary?

Also, if I am traveling out of the country, they are not dependent on my cell plan, as long as I have wifi I can send and receive calls with a virtual number from anywhere in the world. 

Your price point can get you a pretty nice condo depending on where.

Rates can change up to 2-3 times a day, sometimes more, depending on what the market is doing. 

Depending on your amount you may want to consider a debt fund too as its less work and your money is deployed/paying you interest so you do not have to keep finding deal after deal. just some food for thought