Don't know where you live, but I'll assume for the sake of simplicity that real estate rentals provides a good return on capital (if you are in Vancouver, Victoria, Toronto, that's probably not true, and perhaps the simplest thing is to divest and put the funds in an investment vehicle that requires less effort on your part). Looks like you just have a temporary cash flow crunch, so just hang in there! Being +$1000/month means you'll get out sooner than later.
RRSP is just a tax deferral, so there's only a win when the tax rate you defer is higher than the tax rate you'll eventually incur when you withdraw the funds. The bigger the rate difference, the bigger the real win. I only ever make an effort to use RRSP's to get below the top bracket. Since un-used contribution room accrues, there's no need to push to use it all up this year. Definitely don't add debt to max out the RRSP's, unless you really think your RRSP returns are going to be higher than your (after tax) interest payments.