I assume you're talking 7/10 of an acre?
There are alot of people, including the Mississippi DWF, who think it is too small and would suggest a CC pond only. My pond is in southern Miss. and I read the extension service publication prior to building/stocking my pond. The link to the publication is
http://msucares.com/wildfish/fisheries/farmpond/management/ in case you are interested.
My pond is 1 acre and it was originally stocked starting 7 years ago w/ BG, CC, and shortly after, the LMB. Earlier this year, I put in 19 HSB so my pond is similar to yours except I likely have some CC left over. I regret the CC and repeatedly suggest not to include those as they become fisheaters and make it more difficult to control balance.
IMO, you can achieve such a balance in your pond with your fish combination but it is more difficult to both assess and accomplish a balance than a larger pond. It takes more concentrated efforts on promoting certain fish and retarding others. In my case, it was too may LMB causing overpopulation and stunted growth and very limited BG population levels as they were decimated by the overabundance of LMB. I started feeding the BG a few years ago(which the HSB also appreciate) and started to ensure I caught 10 lbs of LMB a year. This has improved the LMB growth somewhat but more work is needed.
Hopefully, you will get some other more knowledgable people to join in with other opinions.