People who had received notices of demand and facing foreclosure were asking about their options.

Stick to the easier deals if you are new or newer to the foreclosure world.   

Is there a % rule that I should be using as a base % (kind of like the 70% rule for flips) when considering buying a foreclosure wholesale?

Based on all the information you have provided it sounds like the tenants will be a problem and the property management company isn't doing the job.When I have a problem tenant that will not move out I give them incentive to move with cash in their hand once they are out of the house and the house is in swept clean condition, if it was a foreclosure this would be called cash for keys.It might cost you some money but in the long run it will save you money, you can go after the property management company for compensation.I don't rent out properties, instead I do a lease with the option to buy with the tenant/buyer which pays me more money upfront in profit, the tenant takes better care of the house because they will be buying it.

I am looking for a more consistent deal pipeline and pre-foreclosures has piqued my interest.

I bought the property from the County Attorney's office since it was a tax foreclosure.

This was a foreclosure sale that we ended up being the only bidders on.

Anyone have % of how many preforeclosures actually go to foreclosure?

We did this a ton on the west coast in foreclosure rescue were you simply had no time to engage lawyer or title company.

Most auctions are going through auction. com and they have a good calendar.The other site I use is a foreclosure website, its nationwide, I pay for just one county for the auction data and their calendar is superb.. you can pay extra for more counties but it starts to get a bit pricey.