For most individuals that have high paying careers, property sourcing and management is not the best use of your time.

Get your property appraised by your own source.2. 

I'm also a flipper myself, so I'm constantly on the lookout for good deals no matter the source.

It can be a fellow investor, your parents, your friend or a private money source and so on.

Recently, I have had a significant upswing in demand in my market(I build and flip homes outside the metros in AZ) and I no longer can get by on just the same sources of cash I’ve used over the last few years.

I anticipate being off in just about every area but know that I am particularly struggling with the cost of estimating the rehab (even just ballparking it) as well the financial aspect of coming from an initial source of capital (i.e. a hard money loan) and transitioning to a lower interest amortized one.Thanks in advance, can't wait to see everyone tear it apart!

That can work but you'll likely need to go further from the GTA.HELOCs however are great not only as a source for down payment or renovation but you can also privately lend for 2nd mortgages off of your HELOC.Lend out borrowed funds at 4.5% & receive returns of minimum 11% right there you can make 6.5% return on money that isn't really yours in the first place.

What sources would you use?

Auction dot com has been one of my main sources for finding good deals. 

Many members are experts in their respective fields related to real estate investing, whether that is real estate brokerage, wholesaling, flipping, buy and hold, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.There are some pretty cool discounts on various products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/proIf you haven’t checked it out already, the Bigger Pockets blog features links to their awesome podcast and many great articles: https://www.biggerpockets.com/renewsblog/