Are there possibilities for loan repayment assistance in a position that is somewhere around 30-40 minutes from the city?
As written, it's unlikely.
Little more clarification: Do you mean that you're a DO grad who is looking for loan repayment assistance from a community while you're working on your residency? Or do you mean that you're a DO who has finished a dually AOA/ACGME accredited residency and you're now looking for loan repayment assistance from a community?
NB: It is
very important that your residency program be AOA/ACGME dual accredited if you want to practice in Canada - see this advisory from the Canadian Osteopathic Association:
http://www.osteopathic.ca/reg.htm
And which city do you mean? Toronto - no. Vancouver - no. Moose Jaw - maybe.
I'm finished residency
If you've finished a family medicine residency and are interested in a "signing bonus", some communities have been known to offer these. This is an article from a few years ago which describes
Bancroft and
Belleville, Ontario offering $250,000 signing bonuses for physicians.
http://www.thecanadianencyclopedia.com/index.cfm?PgNm=TCE&Params=M1ARTM0013191
If you didn't do residency in Canada, then there will be a few hoops to jump through in terms of getting license to practice in Canada. As long as you're talking about family medicine, and your residency was ACGME or dually accredited, it shouldn't be more than moderately painful. Best advice for finding what you're looking for - start in provinces where there is a real problem with recruiting / retaining physicians (e.g. NB, northern Ontario, northern Saskatchewan/Manitoba, rural Newfoundland). Contact the local recruiters and ask about their hard-to-fill positions.
And no, these won't be within 30-40 minutes of the GTA.
I haven't done residency yet
As you know, your three options for residency training are allopathic programs, osteopathic programs (see warning above) and Canadian residency programs. Presumably you are a Canadian citizen or permanent resident (you must be to get a residency position in Canada). You are paid while you are a resident, with the numbers differing province by province. You can get these figures off the CaRMS website. Note that DOs are only eligible to match (first round) in Ontario and BC.
http://carms.ca/eng/r1_eligibility_prov_e.shtml
If you are considered a Canadian grad (CMG) as opposed to a IMG, then there may be a possibility of taking advance of some of the return of service grants offered to residents. For example, Saskatchewan offers $25,000/year in return for a year's service in an underserviced area of the province.
https://www.sma.sk.ca/Default.aspx?cid=386&lang=1
These are not available to IMGs (since they already sign a ROS contract in exchange for their residency spot).
This may be relevant:
http://www.cbc.ca/canada/manitoba/story/2008/01/14/irish-doctors.html
Also, what is the typical overhead percentage for an FP in a near-rural practice?
Anecdotally, people quote 30%.
This article says it can be as high as 40%.
http://www.cfp.ca/cgi/content/full/54/8/1197
This article quotes an average of 37% for family physicians
http://www.cmaj.ca/cgi/content/full/164/6/858.