Brief help with troubleshooting code from customized theme

I am a massage therapist on a shoestring budget who paid $800 a year ago to my webmaster/friend (last time I’m doing biz with my friends, too) who created a very nice WordPress website for me (http://healingpathfargo.com/). Unfortunately he is flaking out and I need some things updated and fixed and I’ve determined the problem is in the coding. Without having to pay a load of $ (I can pay some) I’m wondering if I can have someone on this forum take a look at it and give me an estimate or help walk me through editing the code, knowing the latter, though, is a lot to ask. Thanks in advance for any suggestions or help.