If possible could you elaborate one or all of the following.- do you believe that wholesaling is lucrative?

You might find an owner willing to carry back a 2nd mortgage for some or all of the down payment.

Would selling two or all three of the income producing ones be enough for brother to buy your wife out of the one(s) dad and brother live in, and also have some amount of cash to spare to split so that they have an amount of cash incentive to “replace” (mentally in the short term) the current monthly cash flow?

@Cindy Truong - Some other costs that you might want to keep in mind when running numbers for a BRRR on this type of house: Purchase closing costs - Can be high in Philadelphia because of transfer taxes.Holding costs - In addition to interest you are paying your hard money lender, before your tenant moves in and starts paying most or all of the utilities, you will need to pay them.

It means it's easy for people to label something as all bad, or all good based on our knowledge, fear, perception etc.

You can retrofit spray-in foam into the ceiling/floor cavity if you want to go that route. 

I ask myself this because some properties lose some or all the possibility to cash flow because of the mortgage payment.Should I just wait till the supply increases on my area to start investing?

As far as I understand, the process of deleading isn’t hard or all that specialized.

But if you're already selling at a time when signs are pointing to a possible market top, is it worth considering trying to get part or all of that money out of the market and waiting/hoping for a pullback? 

I’ve already mentioned “I’m open to one, few, or all”.