How keep it legal of course but more importantly how to do if effectively.

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.

There are also some benefits to leverage such as tax breaks that lowers the effective cost of borrowing the money.

If you acquire one new property each year, you could significantly increase your wealth and potentially position yourself to qualify for larger investments, like apartment buildings or construction loans, within 10 years.I’ve worked with clients who have successfully implemented this strategy, and it has proven to be an effective path to building long-term financial freedom through real estate.Good luck with your decision!

I do expect greater development of condos and townhomes and higher density single family communities. - Acreage will continue to be a very hot commodity.

Looking for various tax strategies to reduce the reality that a large RV or boat is a grossly depreciating assetI would not have a loan, so claiming it as a primary or secondary residence and claiming the mortgage deduction is not applicable.I sold my primary residence and I have several rental properties which I use as I'm fixing them up.What I'm pondering is living aboard and working aboard developing a new product, while traveling.  

Plus, you get huge appreciation here based on how many companies are moving and developing here! 

I personally like to buy in towns/neighborhoods in which no new builds are possible within 10 miles because all the land is developed.

Much like by the end of this decade, I will take those same steps to become even less involved with work and have more times with my kids who will be really developing and that will be my focus.The difference once I made money, and was able to make it make money for me I de-risked by eliminating leverage.

There is so much growth here - population growth, job growth, and companies moving and developing here.