I prefer to hire concrete cutting because they will use a big hydraulic powered saw with the power unit on their truck.

I am going to cut all of them in line to give you a potential opportunity?

On the other hand, if you are netting significant profits (e.g. 100K+ per year, but I really don't know where the cut off point is) in the US, the overhead may be worth cost / aggravation.I am curious what structures Canadians are using and at the end of the day, what is the effective marginal rate they see.

Construction debt is expensive right now, but with the Fed (most likely) preparing to cut rates, the cost of construction debt appears to be on its way down in the coming months.

I have a STR house in a resort town, but the city’s new stricter policies have really cut into my revenue.

What my accountant did is, she declared most of these as Capital Expenditures, then she turned around and depreciated them in one year per the 2017 tax cuts and jobs act.  

Would it be better for me to go with cheap windows or is it possible for me to buy windows myself and have somebody install them and just cut out the middle man?

You pay thousands of dollars up front to join the community and get access to Pace's own lines of credit with which you can lend on a number of different kinds of deals (Pace takes a fee on each one, of course) and take a cut of for yourself.

An IRS lien, code violations (weed abatement, grass cutting, boarding windows-doors, and demolition costs), HOA fees, water- sewer bills all go along with the property providing the property has any of these. 

Due to higher taxes and home insurance rates, our cash flow has literally been cut in half.