We call this kind of trading "Indicator Soup". Not meant deregatory; in our experience some of those systems indeed work, although most do not. As to the cost involved, and about how to work with a programmer, I've written a blog post here: http://www.financial-hacker.com/i-hired-a-contract-coder/
It doesn't take that long to learn the essentials of programming. I once learned my second programming language, Pascal, in 1 weekend. You should study whatever material you can obtain of the 3 above platforms, MetaTrader, Ninjatrader & Tradestation, and decide which one you want to use. You need to know which one you want before you can approach a programmer. Most programmers only know 1 or 2 platforms. Most will not know all 3. It's the same here or any other forum. Most people will only know 1 or 2 platforms. They will not know all 3.
I'd say you stick with manual and make your trades that way. More profitable and less complicated. I may not be familiar with day trading yet, but I know how to create successful systems and nature of the beast that comes along with them.
I am just in the process of getting some people to code up some MT4 trading ideas I have been harbouring for some time. You have to set out your idea VERY clearly, send them a copy and they will respond within a few days to tell you how much and how long to do it. Plus costs of course. I paid up front $150. I am now checking out the first draft to see if there are any bugs. But it looks good. Their address is ea@mqlprogrammingservice.com