A few general thoughts that may help-
Within the limits of the budget, its much less about how often I record than it is about determining the recording quality that will be satisfactory for me. Personally, if not good enough its not worth making the effort.
Determine what will work best for your type of music, venues, your location in them, and recording techniques. If jazz / classical / seated venue stuff with respectful audiences, omnis may be the best choice, either worn or placed on-stage- not only are they often the appropriate choice for those situations, they tend to have a higher return on investment with regards to sound quality verses cost. They can also work really well for "stack taping" in less than ideal rooms (standing close to a PA speaker or stage fill) or standing right at the stage lip for instrumental and non-PA amplified stuff.
If dealing with louder or less engaged standing audiences, less ideal locations in the venue, and not so great sounding rooms, directional mics may be the better choice, but be prepared to pay more for a similar sound quality to you would get from omnis, properly used.
Any microphones used will need the right combination of sensitivity and max SPL capability for the situations in which you expect to record.
Lots of good microphones out of Japan.. Audio Technical is likely your best option and commonly used by tapers, Sanken is the second brand that comes to mind, but there are numerous others too. For small directional microphones, those intended for hanging in front of church choirs are often appropriate.