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.

I also have a taxable brokerage of about $50K that I try not to touch just incase of emergencies. 

This defers capital gains and depreciation recapture taxes on the sale of your fourplex.After converting it into your primary residence, you may qualify for the primary residence capital gains exclusion ($250K single/$500K married), but only for appreciation after the conversion; gains from the rental period remain taxable.

Interest rates are going to have to come down because there's no way the federal government can afford long-term interest payments at these higher levels, and other countries are going to buy our debt even if their return sucks because there's no realistic viable alternative.

If you did, you could take advantage of some unique strategies, like renting it out while traveling (as long as it’s for 14 days or less) and having that rental income be completely non-taxable.

Property management fees and software subscriptions are deductible, and depreciation reduces taxable rental income.This post does not create a CPA-Client relationship.

When everyone gets out, usually looking for a another deal to offset the taxable gains.

This allows for deferral of capital gains taxes until December 31, 2026, with potential reductions in the taxable amount if held long-term.

Another downside is you loose on the advantages, of the Federal Tax Code, by not closing in the name of a LLC (you can elect to have a LLC taxed, as a S Corporation which is a whole other conversation).If you want to close in the name of a LLC, Mortgage Lenders will offer you Commercial Loan Terms (25-30% down, a 15-25 year amortization, and a ballon due in 5-7 years).

Finally, the cost of a college education has outpaced inflation, due to federally guaranteed student loans allowing universities free reign to raise tuition and fees.