refi lender advised my W2 income will likely only support one more conventional loan.

I highly recommend that you take the time to go through the Mobile Home University course before you make any other moves.

I live in Texas and one of my rental properties is having the roof slide due to broken supports.

I had never heard of renting a property by the room outside of university systems and would like to know if anyone has experience with this and what criteria they used to chose this over traditional property renting.

Your IRA custodian or Solo 401k provider should offer support in getting the accounts set up and rolling over your funds.

My tenants support my small business and I support my business owners and commissioned or self employed tenants when possible.

Sorry Eric but I have 0 clue what your saying, or asking, supporting or taking issue with, or if any of these apply, or don't apply.....  

I run mine through a local LL Association through which I also get legal support networking and forms.

If interest rates were to skyrocket and the market dips in year 10, you will likely have enough equity in the deal to support a lower LTV. 

You'll find lots of support on these forums from Canadian investors; don't hesitate to build relationships and ask questions.