While much if it has universal application, there is a distinct U.S.A. bias, particularly in the areas of finance, regulation and taxation where things are a little different here in Canada.Rest assured there is a considerable cadre of Canadians here who can assist with any Canada specific questions.  

Additionally, flips are considered inventory and therefore excluded from capital gains taxation (both short and long).

The only way to do so would be if you utilized an installment agreement to pay over multiple years. and in some cases they can be disallowed as a disguise to avoid taxation in the current year; however, that does not happen very often.

As you mention, holding RE in an IRA has other benefits - no income tax until distribution, no capital gains tax at sale (if no leverage in place for 12 months). 

LLC- Easy setup, no double taxation/personal tax pass through, increased liability protection.  

Growing cash flow  comes with increased taxation and to get all your equity by selling you deal with cap gains. 

The taxation relief for empty spaces in Canada is wonderful for investors, not so here in Texas.

Zoning, taxation and allowable uses are separate things, though usually they do "match up".

Paperwork is paperwork, just pay somebody to do it for you, maintain a paralegal who specializes in asset protection and business taxation, this enables you to do paperwork for less than half the price which a regular attorney would charge.

Taxation without representation and no category on BP, so sad