First, congratulations to you and your wife on the upcoming baby.
I'm going to provide my suggestions. Some of them are not what I am doing, some of them may not be mathematically optimal, but they're based on the info you have provided.
#1 - you do _not_ need to keep paying the high MERs. Stop giving them your money.
http://canadiancouchpotato.com/ has 3 model portfolios. I am embarrassed to admit that I am currently following all three (Tangerine, TD e-series, and just started with Vanguard ETFs with Questrade). I'd recommend the TD or Vanguard ETFs and skipping the Tangerine given the amount you're working with. They were all fairly simple to set up, with Questrade being the most annoying, but I already had a TD account, which might have made it easier. Start off by putting new money into the approach you decide on, you can worry about moving over your existing money later once you're more comfortable. If you go with Questrade, several people on the board have referral codes.
#2 - I wouldn't go into landlording in Sask right now. You are about to have a baby which equals no time to get up to speed. Also, the vacancy rates and employment stability in the region are concerning. A basement rental suite makes sense if you can take care of the mortgage without that extra cash flow.
#3 - once you've filled out your TFSAs and RRSPs, you're going to need to start investing in taxable accounts. There is some stuff on the Couch Potato about doing this in a tax efficient manner. I'm just starting to figure this out, but from what I can see, Canadian equities tend to go in taxable accounts first.
#4 - if you're concerned about the market, don't dump in the leftover cash all at once, do it in regular defined intervals. There are basically 3 options. You can wait on the sidelines, you can put in regular amounts over a 6-8 month period, you can put it all in a lump sum. Dollar cost averaging is better than sitting in cash. And it's almost always going to be better than paying off the mortgage. (I admit, I paid off the mortgage, it wasn't the smartest thing.)
#5 - figure out your budget for when your wife is on maternity leave, and start living on it now. If you don't have enough coming in while she's on maternity leave, you should save the extra to tide you over. If you have enough, then put it towards FI.
#6 - once the baby is born, you should look into RESPs. The government matching program is pretty sweet.