Stone Song

Stone Song is complete at 47,000 words. Should it be longer? Should I get someone to edit it? Cost is an issue, for a doubtful return. Will people buy it, edited or as is ? No way to know beforehand.
I think there will be a few typos, and probably a good editor could improve things, but I am very wary of 'improvements' which just might not actually help the story. I'm tired of messing around with it. Once published I can get stuck into the next big project, which might be one more go at Eland Dances, or might be something completely new. Stone Song is not Great, I just hope it is entertaining.Then too, I must finish the next Sherlock story, S. Holmes and Lady Chatterley's Voodoo Dolls.
I have added a bit more motivation/tension by way of the death of a character; however we never actually meet the guy, everything is at a remove & hearsay. To be a real thriller all the action should be up close and happen in front of readers. Also, the protagonists need to be directly endangered, which is not the case. There is tension, but not really direct threat or danger. Should there be? Should i write in another couple of thousand words with Hancock, the Baddie, gunning for Ty, perhaps running the car off the road with his van?