Going DIY and self-managing this type of asset from another state may not be an easy task for such a building and neighborhood, it needs more attention (and probably capital).Try an unconventional approach.

Most plumbers have camera systems that can go 100's of feet usually and it is pretty easy.

"Getting in" is easy; making money, managing the business, with the increased financial risk of commercial properties is a whole different game. 

Easy to do IMHO.Some folks use a tablet with a service but why complicate things I say.

I'm going to reiterate what's already been mentioned above, but I'm going to actually give you examples of why it's relevant to you to find a U.S. tax professional.1 - You're going to need to file U.S. taxes once you have property down here, there's federal filings, state filings, and sometimes local filings too2 - Tons of tax treaties between the U.S. and Canada that are easy to miss and can cost you a lot of money (important one with rentals - effectively connected income - if the professional you talk to doesn't know what this is, run away)3 - The amount of days you spend in the U.S. needs to be tracked and if you go over a threshold, all of your worldwide income could be taxable by the U.S.4 - Selling real property means up to 15% of your sales proceeds might not be available to you for years (FIRPTA)5 - Lots of nuance at the state and local levels, which both want to take as much money from you as possibleMain takeaway here is that you should find a U.S. based tax person.

Its easy to sell high yield deals.Looks like the rates they advertise are a good bit higher than other options ive found.

Infill is simple, but not easy.

I think it's easy for attorneys and brokers to become jaded and to lose that 'human touch'.

If it was easy to take $1k and turn it into $10k easily with minimal work and sacrifice like the guru's say, then we would be the richest country in the world.  

It's that easy.