If you flipped these properties, can you re-invest (in the ways you stated), and not only recover your current cash flow, but increase it?

This person insists on getting a HELOC and their reason for it is because we will only pay for the money when we need it, but the rate increases with the prime rate.

We are due for a slight correction, but those generally quite nuanced and they happen on a neighborhood-by-neighborhood basis (example: the prices drop 2%-5% for a quarter or two in a specific neighborhood).Q2 set a benchmark. 1/3 of all SFH sales were sold for $2m+, and the median sale price for a SFH was $1.62m, which was a 13% YTY increase. 

rational people do not think every inherited tenant is bad. but rational people know that inherited tenants remove a degree of control and thereby increase risk. you are safer in assuming they are bad tenants, than in assuming they are good tenants.

So if there is scarcity in one type yet the demand is higher, that is definitely a consideration.

BP-ers, what are some considerations I should be thinking about when looking at a MFH near an airport? 

You are also eligible for a second FHA loan if your family size increases.

I would probably pass if others are going for 30k ,       maybe be patient for the next one with comps above yours to have room for a price increase  

No consideration of other things, just no.Not because of the lie, but because of the eviction.

To increase profitability, you do have options- just reduce the water usage by 30% or so.