Yeah, the interest increases your debt but if you can buy a good asset now you'll be amortizing that debt much more easily with multiple income streams.

A HELOC will impact your credit, so you might want to refi into a conventional loan at some point.

He let the grass grow to high, his dogs chewed the baseboards and dug in the yard, He put a whole in the garage drywall with a barbell, and the fence is busted in multiple places.

Looks like AC is the same issue - instead of one, I’ve got multiple units.

- Or do you pool funds from multiple properties and manage roughly what should be there with a spreadsheet or something similar?

See the Zillow link for the property below; interior is only 2,000 sq. ft not 2,556 (2,556 includes the garage)https://www.zillow.com/homedetails/600-N-13th-Ave-...Work for this house would include turning it into a 3/3 while leaving the existing 2 car garage, 3 brand new bathrooms, remove the wall separating the kitchen from family room, refinish and/or replace kitchen cabinets (countertops will be reused), replace all exterior doors and windows with new impact glass, new HVAC system with duct work, minor electrical (high hats, new fixtures, inspection repairs), paint, new casing/baseboard, and maybe new interior doors. 

The way I see it is that MIRR accounts for IRR's two short-comings: 1) potentially having multiple solutions when the cash flow from the investment goes from positive to negative and vice-versa, and 2) assuming that you can reinvest your positive cash flow from the investment at the same rate of return you expect your investment to make (the IRR).

Go interview with multiple brokerages in your area and ask if they expect you to attend meetings and such. 

i always focused on multiple income properties like Block of flats / MFR , Home and incomes etc. these are much better to support the loan payment then single houses. 

Even when you offer more earnest money and less days for closing, if the deal is good and there are multiple cash offers the seller will likely take the other offers more serious.