L2 MAC filtering is fine, but I'd try to find some kind of authentication system that would allow guests to dynamically connect with your tenant's password or something...

And a PM can only filter so much, expenses can mount and before you know it you are making no money, and maybe have a hard to sell property. 

I am mailing to what I admit is a small list, about 300 names, that I divided it up into 4 chunks of ~75 each, with the intent of mailing to a chunk per week, so that each name gets touched about once a month, and I intend to mail to them until they have been hit at least 6 times, maybe 7.My list covers my local zip code, is aimed at absentee owners who's property hasn't had a sale in the last 10 years (so hopefully there is some equity).The letters are simple, typical 'I want to buy your house at <address> give me a call' yellow letters, the phone number is a local google voice number that has a message from me about how I buy houses in any condition, can close fast, etc etc, the idea being that the letters generate a higher volume of response and the phone message filters out some/most of the tire kickers.Of the ~225 letters that have been sent so far (last batch of round 1 goes in the mail next week) I have heard back from about 20 people, and by heard back I mean they listened to the entire voice mail then left me a message.  

I've used this one for years and love the filtering it doesVoicemail

You have a massive budget and honed system for lead capture and you want your marketing piece to filter.  

The doubters and naysayers are just helping you to filter the masses.  

Good question It depends one what you are marketing for, how you are marketing, and what filters are used in researching your leads.

allowed us to filter, sort, prioritize and nurture leads which became prospects.My current system happens to be better described as hoops and hurdles.

I'm using listsource filters to keep the list under control.

I already use listsource and I know how to filter the LTV, my question is what % LTV should I target for the most motivated sub2 sellers... 80% LTV?