A place that can be helpful for an idea of what impacts your score and how is Creditkarma.com (no affiliation).

We've actively marketed with Google & Yahoo and various Mass Email Marketing Affiliates through multiple URL's for 15 years and bought and sold SFH across the country.

They also checked with affiliate lenders and Fannie/Freddie who said the same thing.I could do an all cash purchase fairly easily, but the cash on cash return gets so low at that point to be less attractive. 

I don't know this company.If I had a company such as this I wouldn't be pitching so hard to sell it.Just direct people to your site where they can contact third party after third party that bought from you.Third party endorsements you can talk to are much more powerful than someone blowing hot air.I could talk or write for 30 minutes but giving 3 references people can call and hear from them directly is MUCH more powerful and credible.I am not talking about one investor out of ten you sold to that is happy.I am talking having 7,8,9 different buyers you can talk to.No matter how good you are there will always be a dissatisfied consumer but if half to a majority are not happy it shows a trend of selling bum deals.Endorsements from non-affiliated parties are key to growing an honest and credible business.

Regrettably, these "launch" formulas are all about affiliations and if we are on more then one list we get hit up by just about everyone.

Not sure if the OO status makes a difference but you can try National Real Estate Investors Group Insurance I had an issue with insurance last week and they were cheaper with better liability limits than anyone else I found. http://www.nreinsurance.com/.Note: I'm just a happy customer no other affiliation.

They are not allowed to be in the real estate business.They may have affiliate companies.

I would like to hear more from those who have attended and are not affiliated. 

Check them out, I'm not affiliated in any way, but after using them our seasonal fluctuations diminished.

There is now a new tool that will tell you much you should be able to rent your place for that I thought the forum would be interested in:https://www.eliotandme.com/estimatorI have no affiliation to that link but I did see it posted on Product Hunt:https://www.producthunt.com/posts/eliot-me-estimator?