After giving them a notice to vacate premises, they have repeatedly called/texted me with which I believe are erroneous claims. 

People interviewing multiple brokers are common, and smart if they don't have a good relationship with an agent already.

That being said I also have the option of giving them  a notice  once it starts going month-to-month  if I choose to  boot them out ...

Although in most areas Realtors will use a  common realtor created contract.

You have many ways to get a loan but the most common ways are the following:FHA:This allows you to put the least amount of money down - 3.5%, however, you have to pay Mortgage Insurance, which can be a little pricey, that combined with the higher loan amount because you are only putting 3.5% will increase your monthly mortgage payment. 

I'm sure this isn't common, but I had my first deal under contract within 48 hours of becoming aware of the fact that normal everyday people can invest in real estate.On a Tuesday night, my friend mentioned that he owned a duplex and said "I sometimes forget I own a rental property until I receive a check at the beginning of the month."

Can my landlord give me a notice to quit if It was not signed by a state Marshall?

It's best to give people advanced notice on when you intend to do the submetering.

@Timothy M WeberAs a contingency I would certainly want to look the leases in detail Look them over Good *before I agreed to the sale I also would specify that the seller is to give notice and get sIgnatures to all tenants in any and all units involved that they must vacate and the lease is not being renewed .

If they don't pay, immediately serve a 3-day pay or quit notice and go from there.