If you make the seller pay all the closing costs in the contract, then you're buyer would not be responsible for any, or vice versa.And as James stated, you can always choose to pay for the buyers closing costs out of your assignment fee, even if the contract with the seller stated that the buyer would pay for them.

All depends on the numbers and timelines 

It depends.

Some of the bad areas make the best investments, depending on what your investing goals might be.

That is more than double what I paid for 2 systems for a 2400sf home in Vegas but I suppose it’s market dependent.

Population growth will drive up prices and rents, and how fast prices and rents rise depends on interest rates.Assuming interest rates remain stable, based on historical data plus my assessment of the current market and economic conditions, I expect the next 5-year average appreciation rate to be over 11% and the rent growth rate to be ~8%.

Depending on the margins of the deal such as loan-to-cost and rental income this is a great approach to get you max cash in the pocket without considering debt-to-income or personal tax returns.Let me know if you have any further questions.

It's hard to beat a match for the 401k, but depending on your situation ROTH 401k's are great opportunities. 

Fees that are typically eligible are attorney fees for foreclosure (Depending on state), court filing costs, and costs to secure a property. 

The best location for you will depend on a number of factors such as: (1) where you work (commute?)