Around the $1000 per month mark I use 23% for vacancy,repairs,and capex. 

if you go in the wall is going to cost more outside the wall-less,Do not get the the Electrician to cut  the trench for the wire get him to mark it out and get a labor with a grinder to do it electrician is 4 times higher than a labor get them to put it in after the wall is open get your drywall supplies and get drywall sub  to close it up after repairs save more money  we do it all the time.

@Mark Weinberg  For HML, no, I don't know of any that will do 2nd lien position, they always want 1st position. 

@Mark Willemsen thank you for taking the time to reply.

Thank you Mark I will be planning on to attend one of the meetups, thank you. 

@Mark S.This is true

@Mark Miles Here's a section of an article that was published in the local newspaper in January of this year.

As a homeowner who is facing a foreclosure, don't expect that a short sale will not leave any marks on your credit record.

Mark

Being a lawyer or an engineer won't cut the mark nor will having made several million dollars in doing any aspect of the industry!