So, I haven't run into an instance where we've needed to make a quick decision before having already done the due diligence.I used Airdna 2017-2018, and at that time their customer service was terrible, there was missing data points, and didn't pull all of the competitors which is why I stick with the tactic I posted and my clients always end up in the 90th percentile of competitors.Regardless, I agree Airdna is worth the investment even for the base subscription because of all it has to offer... 

My question is if you have a subscription box on you site where sellers can enter their property info, and one for your buyers page where buyers can register to be emailed for your deals...what is your email that you respond back to them with?

I have not been satisfied with the crowdfunding  real estate ' The returns have not been what they promise and they don't treat the investor as a partner and often hide behind the subscription documents you sign when things go bad (which they will).

Washington Landlord Association has good forms with a reasonable subscription fee.

Plus cap rate data is available for individual trades on CoStar with a paid subscription.

Some of them do have a subscription fee but you can try them out first with a free trial.

I like DocuSign but I get a subscription for free and don't know what it would cost for you.

Level 1: An LLC formed in the state of the property for each investment.Level 2A: An Ownership Wyoming LLC holding company for all the equity of the multiple LLCs at Level 1Level 2B: A Management entity to facilitate legal/tax/bookkeeping/day-to-day ops/etc. for each Level 1 entity (goal to leverage economies of scale against overhead cost of local third-party contractors, vendors, software subscriptions, etc.)Level 3: MyselfI feel with the layers described and proper legal & accounting I's dotted and T's crossed, there is a sufficiently thick corporate veil and there will be appropriate insurance for each entity to further protect from loss.

I'd have to look further at the rules for the deductibility of the course, BP book and subscription however to answer the question on whether or not you can deduct a portion of your expenses, it depends on what those expenses are for.  

A monthly subscription fee would be awesome for people who own multiple properties.