First one would be Zillow Rooms - in terms of range and scope of audience.If you want to be formal and have great photos then try on coliving.com Also I believe that booking.com allows it. 

Efficient negotiations secured the property for $120,000 on favorable terms.

If the approximate $140k is seller financing, are the terms of such agreement made in the real estate contract? 

It would be my first one, I’m confused on when we agreed on terms.

My current primary ( scenario 1) Keep the primary for the life of the loan ( current rate is 4.5 so i dont see my self refinancing anytime soon)current home value 1,150,000Loan amount 935,000appreciation estimate 5% per year after a 28 year hold and the house is paid off I would have a house worth 4,312,000$my current mortgage is 6125$ ( piti) included My second option( scenario 2) Sell the house, walk away with $150 ,000 ish in hand and put that into a low cost index fund Rent a house elsewhere for about 3000$ ish and take the extra 3000$ im saving everymonths from not having to pay my mortgage and puting that money in the index fund as well I ran the numbers on both of these scenarios and doing what I mentioned above would break even at about 28 years meaning my stock account would be worth 4.3 million just like my house would , but the only is that holding a house for 28 year would mean 28 years of property taxes, loan interest ,home insurance and repairs etc whick I calculated to be about 1,200,000$ at minimum which raised my eyebrows to say the least Also i understand that each of these options ( stock market vs real estate ) will have there tax consequences ( long term capital gains) so any thoughts on that would be appreciated as well.  

Consider long-term goals, market trends, improvements, tax benefits, and flexibility.

So it is a good long term bet (provided the socialists do not bankrupt you first).

3 Steps To Take Immediate Action:1) Set small, short-term goals (establishing a one-year, three-year, five-year goal has helped me tremendously)2) Seek help from people smarter than you (I am never shy to ask questions, even the stupidest ones)3) You grow through what you go through (We will make mistakes along the way and that is ultimately what will help us become better investors)

Our long-term plan is to eventually move out, rent both units, and buy a house of our own.

It would be worth seeing how much the in-law apt would add in terms of value since appraisers in different areas value them differently.