Would the three other roommates (not renewing) have to give consent (in form of writing) for the Landlord to use the original security deposit for this "transfer lease"? 

Steve, there must be written consent for an assumption in a seller financed note, best to include some reasonable parameters, consent not unreasonably withheld.  

We're currently waiting on a signed consent form to get information from the bank, but I thought I'd reach out to see if anyone has had this experience and if so what would be options (other than speaking with an attorney) to get passed this.

Without some kind of operating agreement indicating that he has the right to lien the property you all own, I'm surprised the bank is ok with it, unless they are having the other deeded owners sign some kind of consent for closing?

Just call a couple local tow or impound companies and ask them how to deal with it.If that vehicle happened to roll on to the road and if a good citizen reported it as abandoned, the city would remove it after 48 hours.Source:http://www.legis.state.pa.us/WU01/LI/LI/CT/HTM/75/...iv) The vehicle has remained on private property without the consent of the owner or person in control of the property for more than 24 hours.

Tenants must show: The clothesline or drying rack will not interfere with maintenance of the rental property;The clothesline or drying rack will not create a health or safety hazard, block doorways, or interfere with walkways or utility service equipment;Tenant seeks landlord’s consent before affixing a clothesline to a building;Use of the clothesline or drying rack does not violate reasonable time or location restrictions imposed by the landlord; andThe tenant has received approval of the clothesline or drying rack, or the type of clothesline or drying rack, from the landlord.SB 328 (Hueso).

You'll probably run into a problem, though, once you do contact the HOA since you don't have the borrower's consent to discuss their account. 

If the buying agent helped or had knowledge of someone intentionally breaking the lock to prevent showings, then this could lead to a $15k fine, suspension or revocation of license.

This week alone I have literally had 3 emails from different lenders, investors, and sites from BP members. I added you as a colleague so we could stay in touch... Not because I want you to solicit me. I have numerous...

Like @James Carlson, Zeona McIntyre followed this approach initially without LL knowledge/consent.