However, it's typically the builder/renovator who collects and remits the HST.  

When referring to 50% expenses, what ones would equate this percentage?  

@Brian Quigley  Typically if you are not looking for bank financing your progression would be private individuals then hard money.  

The closing company I typically use doesn't accept bank checks for cash closings nor above 50 or 100K.

There are dirty people out there who will try to make a bad deal look good to a buyer (another investor typically) and try to get some money out of it but if you can see that your wholesalers and just starting out or is just off but has good morales and really try to bring you good deals then it would help if you take the little bit of time to teach them what you are looking for so they can be your best wholesaler and make you lots of money by having the right numbers...

The best rate I'm able to find on $449,000 is 4.75 paying 2 points.Can the bank typically do this as two loans? 

No you can't charge a pet fee but you can hold them to the same maintenance guidelines as others and you can ask for references and deny if they have poor animal related references.

my understanding is that brokers typically first shop deals to  investors whom they've had previous dealings with, then to other brokers in-house, then to the general public. 

Take references from people but be sure that you have a number of different people who don't work with/for each other.

Also, what is typically the difference between a sellers license and a brokers license?