It takes time, but if you are consistent it not only builds your knowledge of the surrounding areas, but it also can lead you to some hidden gems!

Is anyone that has had significant experience with FHA loans aware of any "hidden" restrictions that most new investors are not aware of?

I had a lot of stick built experience (160 deals) and looked to mobile homes as a hidden market, with low to NO competition investment avenue.

Keep it hidden but accessible and never draw unless you intend to use it.

So, the more you look at, the more you crunch the numbers, the more chance you have at finding that gem.

However be for warned BP is an incubation site for the industry so most very experienced folks already have their financing in order. your reply's from Marketplace will be dominated by the newer rehabber or the one's that have had no ability to get funding.. so due diligence is warranted .. that being said you may pull out some gems. 

Some auctions show the Plaintiffs max bid and others are hidden.

In addition to the 2.125% interest you will pay on the 401k, there are two "hidden" costs to this transaction: A) the opportunity cost of not having those funds within the 401k and compounding interest, and whatever your tax rate is.When you borrow from a 401k, there are no taxes or penalties assuming you pay off the loan properly.  

I think you may hard pressed to turn that 100k into a 5k a month cashflow, I don't know Toronto but in my market you would likely command around 3-4k a month before expenses and that's a gem.

Not a big deal, but something to consider.The oft times hidden cost of a 401k loan however is effectively your tax rate.