I'm wondering if you all could give me some pro's and cons:I'm wondering if it's a good idea to asking for a rent increase as part of my purchase contract with a tenant who is month to month and the seller has a management company taking care of property.My thinking is, if I were the seller and they asked this of me instead of asking for a lower purchase price I wouldn't mind.

Insurance is about $70, and there are no property taxes for a property under 75k in Louisiana, property management of $65.Rent increases about $30-$50 a year.I'm looking to cash flow about $215.

I really admire your strategy - I'm about to put a bid on a rehab in an estate and I think I'm going to increase the earnest money dramatically and drop the contingency. 

This should be a very common policy down there and shouldn't raise your premiums much, if at all.If he is sharing the profits with you it could be a great way to boost revenue, you just need to be aware of your increased liability. 

A 4-plex (strictly for investment) really caught my attention and according to rentometer, I can increase the rents by $275,  per per unit.

Alternately you could send them all a notice explaining the situation and indicating that if there is another fine that you are simply increasing all rents to cover the potential costs. 

but your taxes and HOA will increase as well. in a downturn you go negative. 

Send in a ton of paper work FEIN, rent rolls for SFS, 3 years of tax returns, 24 lease agreements, contract, p&l on complex, I gave them a 5 year plan of expected rent increase vs expenses.Scheduled walk thru- Due diligence time.

Now we need to give her rent increase notice, can we increase her rent based on $650?

I looked at New London and think it's a fantastic town, probably going to see increases in value IMHO: its got great "bones" as a city, is starting to "urbanify" (trendy places starting to open) but it's way behind the curve, and it seems to me the hipsters there are still young and haven't started having kids/figuring out how to make the city work with kids--so prices are dirt cheap.