So a few years back I got hurt at work, I am not currently working but right now I do have income.

I make about $1300 - $2100 a month from my stock portfolio via Dividends, I have a few crypto miners which income can vary and price of the coins are volatile but I make maybe about $300 a month in crypto with more miners coming in so expecting this to go up, and I recently started flipping stuff on the side this year which is making me a small amount of money on the side maybe $300 - $400 a month

I have lived in the same house for over a decade and have been renting and our land lord wants to sell and made me a really good offer of $220k when other places were selling at that price about 1 - 2 years ago and now places in my area are going for $240k - $430k with the average being about $310k so a really really good offer in the current housing market. I would love to just sell all my stocks and buy the house out right however after selling everything and paying back money I have borrowed against my portfolio I would not have enough to buy it out right, the land lord is older and just wants out but wants to give us the opportunity to buy the place and has already confirmed he doesn't want to do anything such as private lending (not sure if that is the right term but so I will explain: he doesn't want to allow me to pay lump sum and then pay monthly for the next 10 years, he just wants to be out right done)

So I am looking for some possible options where I can possibly get a loan on the house while not working. There are 3 other people that live with me that also pay bills for the house and we have done so for the last 13 - 14 years none of which can co-sign for me all for different reasons.

Some things to note, I would be a first time home buyer, I have a really good credit score, I have someone in my family outside of the home that said they would co-sign for me on a loan who also owns there own home valued at roughly $400k - $500k. I own my car out right not sure if I could put that up for collateral or something it's kbb value is $26k. I am not sure if I can take potential income from renting out the other rooms in the house into account since I will also be living in the same house, I know you can do this with duplex+ but I believe that is different since those are different doors.

After selling my stocks my income with be low and volatile with just the other 2 sources of income, I don't want to wait to long and the current owner to revoke this offer as I know it is to good to pass up.

I am looking for a little guidance on which option or route I should take for my particular situation.

PS. Sorry if my post seems a little mixed up, I tried going back and adding on to include extra details and things I thought would be helpful to better understand.