One or many does not really make that process more difficult, if you keep good books it is only a matter of adding the numbers together...But it is true that LLC still have costs.

Or is there a card that offers good incentives when making purchases like this?

This is true for all types of investing, whether real estate, dividends, bonds etc.

I was going to add a small gift card for a local grocery store or possibly a pizza gift card.

I want to highlight the above sentiment because it should hold true for every state.

There are a number of other options than traditional bank financing, but really, if you're in this for the long haul and especially if you're looking at this from the perspective of a guy with some understanding of residential construction, you shouldn't try to fight the learning curve from the start with things like BRRRR, 3.5% down-payment FHA loans, all-cash offers with personal loans + cash advances from credit cards, etc.It's complicated enough learning how to run rentals.

I've heard stories where someone opened a simple credit card prior to closing on their mortgage and it delayed the process.This may be different if you're using the same lending institution for both the HELOC and the refinance, just make sure if the loans are going through two different departments that everyone is on the same page.Best of luck! 

Also, how long are the cards no interest?

My daughter just turned 10 months, so would be looking for daycares for now.I dont have any cash saved now because I'm clearing all credit card debt, and plus I just bought my first property in October.

It is true that the CRA does not recognize the 1031 exchange and would tax you on the capital gain.Do you own this property in your name or is it held within an US corporate entity?