Real estate requires cash, that's why it's called in-vesting.

The percentages are going to be up to you There are all kinds of High interest account that require all kinds of hoops to keep them.

So, coming up with more capital to invest in another property requires some creative thinking.

But tax wise just here to note if you buy a 4 unit as a primary when you go to sell (if you meet the requirements) only 1/4 of the gain could be excluded under the 121 primary home sale exclusion.

Gas heat would require constant tank refilling and it would be very bad to run out in the winter.

@Brady Bitter these funds have margin requirements. 

There are more complicated strategies to maximize larger listings that involve having like multiple listings for same property and do individual room rentals when it is slower and then for larger length stays, larger groups, and more desirable dates you'd book the whole space, but I think its easier to just do two separate. 

I have been able to find a couple of options for this setup though, they just require separate leases for each room and sometimes 2-3 months of rental receipts as well. 

I did do a precursory investigation into what requirements are and it looks like there might be some zoning restrictions, as well as permits required.

That would mean there is an approved site plan that includes roads, water, sewer, storm water, curb, gutter and any required buffers.