We "inherited" a number of Sennheiser vocal microphones as well as some cable. We recently had a concert of three songwriters. They all had their guitars (or other instruments). Fortunately we were able to plug two of the guitars into a 1/4" to XLR converter box.
Pretty much tells me that we need microphones. The musicians tell me "get some Shure 57 and Shure 58 microphones". The Shure 57 for instruments and the Shure 58 for vocals. Probably going to have to buy these one at a time or so.
We also had a performance by Moscow Nights/Golden Gates which is a music/dance troupe. They requested some wireless microphones (which we don't have) - fortunately they had two that they could use.
This tells me that we'll probably have to invest in some wireless microphones (probably one per year).
What are some reasonable microphones (vocal and instrumental) that I should look at purchasing? What are some reasonable wireless microphones (and base units) that I should consider? Should I go for lavalier style or handheld? I've never been really impressed with the vocal quality on the lavalier microphones that I've used (Sony).