Sorry, not familiar with Mevo Start (I just put service bulletin in PowerPoint ). Setup in part depends on liturgical style
Feel free to check any number of discussions I've posted on our church setup (and others)
Unfortunately, the answer to your question is - it depends (sort of like asking what is the best car)
Important factors include
- number and type of camera connections
- audio connections
- other planned audio and video effects/filters, including overlays, etc
- planned resolution/frame rate, etc of stream? also locally recording (at same or higher resolution)
- how long you want the computer to last (ex do you want this computer to be able to stream at 4k in 3-4 years? or would you get a new computer for 4K streaming if such becomes a thing?)
- what else will you use PC for? ex, our new PC is overkill for our church service streaming today. But this computer would also the one to do video editing of clips, already done for example for a baptism
- and biggest question is your budget? then comes issues of onsite tech knowledge/support? do you need Sunday AM live real support just in case (not first line support script kids with asking have you plugged it in?) etc Do you want next business day onsite physical hardware support? etc
Do you need this to be a laptop (not advised)? do you have physical room for dual monitors? do you have clean AC power, or have you budgeted for a AVR UPS [which I always recommend]
so... it depends [yes, I do this sort of thing (converting business requirements into tech specs/roadmap) for enterprises]
From an expectation standpoint, assuming a 720p/1080p single stream and recording with same encoder settings, you can get buy with a $500-800 computer [major US metro pricing], most likely. but such a system will have constraints. Spend $1,000-1,500 on the computer [then plus monitors and cables, etc] and you start having plenty of headroom for years of service, and good onsite support options. I avoid consumer grade PCs more than pandemics. I much prefer to spend a little more upfront and get systems that really are well built and last.
Also, unless you have good network security (and 99% of HoW don't), and streaming is important, you might want to consider a small router/firewall to protect the livestream PC
