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I posted your last comment in another forum so maybe you can get some insight into this situation. I can share the forum with you if you want to follow it. As a person that has worried about 301s in the past I hope I can help someone else

I would use all the factors you displayed in your picture. Search volume is also important, I would also check the trending graph included in the keyword tool this will help you pick the right time to start ranking for those keywords. Develop natural and clean content to support your keywords you are trying to go after

There was a similar question posted earlier. Go down to the Question "Unknown Links" and someone left a great answer

Intuit probably doesn't allow access to the htaccess. If you move your site to one that allows it you can then redirect them. I am not familiar with intuit but I worry that you are a subdomain of the intuit webstores. Storesonline uses this type of technique ( I am pretty sure) so no one every leaves in fear of losing rank and authority. If this is the case you may have some ruff waters ahead if you decide to leave. My personal not professional opinion is you will be better off if you move to another host and then within that host switching domain names. Check your site in semrush and see how many keywords you rank for and if it is far less than you thought this maybe the case. The site you built maybe good enough to climb the ranks quickly.