Also, where can I buy low cost blinds that are decent quality? 

Yes, prices are high, but there is good potential for appreciation, and tenants are generally reliable and high quality. 

I have listened to a large number of podcasts (a few with them specifically speaking) and read quite a lot about their company.

Even if your GC is decent was able to get your job done in 100 days, if it doesn't resemble the comps in quality then your 300k exit is now 270k and with all the exit costs and holding costs your 40k expect profit is now under 10k. 

Other qualities are being a member of National Notary Association.

Your biggest problems here are going to be how to properly qualify someone, what to do if someone stops paying, footing the bill if you have a big repair item, finding quality and reasonable vendors/contractors to fix things, and keeping track of payments.If this isn't you, give me some more context of where you're at and I can give some better insights. 

Experienced investor looking for new (quality) direct skip and cold calling companies

Usually, you can speak to some of the tenants during a walk-through.

Are there any realtors in HI that can speak to how robust the Honolulu market is?

I asked to speak to the owner and they are telling me that I can’t.