I don't think you need an app with a monthly subscription to track property addresses of vacant houses if you are budget conscious and haven't done a deal yet. 

-what systems and subscriptions do you use?

Just speaking generally, $2,000 is not nearly a big enough budget to build anything useful.I find it hard to believe there isn't already a well developed scheduling/calendar SaaS product that someone else has already developed that you could pay an affordable monthly subscription.Here's 3 I found just doing a google search ranging from $8 to $50 per month.https://calendly.com/https://simplybook.me/en/https://acuityscheduling.com/s...Sometimes it's easier (and cheaper) to just pay someone else a monthly subscription instead of trying to re-create the wheel.

@Maria MejiaPropStream is legit and worth the monthly subscription.

Then there is also subscription-based software like propstream that makes it a lot easier to do on your own.

Is the subscription data much more accurate?  

We've been using Quickbooks for years and are considering Quicken because it costs a lot less than the new Quickbooks subscription rate structure.

Good Morning BP,My name is Carmen Ruiz, I recently signed up for the PRO subscription with BP. 

Yes I have been on subscription for 8 years or so.

app the best in terms of accuracy and ease of use, but they do have a small monthly subscription fee.