Quote from @Michael Poloncic: Three individuals signed a lease together, all friends, the lease is set up where each of them are expected to pay 1/3 of the rent.

In a situation where you were doing an arbitrage (renting it from the owner, then yourself re-renting it to someone else) your costs to renovate/fix it up while you're using it would be able to be capitalized and depreciated by you once your rental was in service (available for rent to others). 

I would be wary of any service where you pay a lump sum and they provide the items.

I'm have been asked to enter into a partnership with an experienced investor, and I'm not sure how to or the best way to structure a partnership. Any advice or resources you can point to? I'd like to double my units i...

I suggest using a service like Mayistay.

What kind of seasoning is generally required as it relates to the rents/revenue as it relates to servicing the note, etc...I currently own one PadSplit (acquired via Subject-to) that has been up just over a month.

We like the software, but the consulting service seems taking a bit too long... we would like to have someone to help us out with set ups, automation and a general marketing plan...

At our firm (tax advisory) we are offering a service to help clients with this and we expect many tax/cpa/law firms will as well. 

I spoke with the title company who is still helping us wrap up the set-up of a servicing company, and she confirmed that they would be responsible for the principal / interest for Nov and Dec, while we are responsible for the escrow shortage balance (as agreed upon).Not sure how it was missed - not my favorite title company to work with.

Honestly, upgrading to a commercial-grade stackable setup like Speed Queen or Maytag might be your best bet.