Welcome to the guild, Mark. The answer to your question is dependent on several factors.
1. Size of board - height of cut
2. Green wood vs kiln dry
3. Hardwood or Softwood
4. Shop space available
5. Your propensity to collect tools
My situation is that I have two bandsaws. A 1948 Craftsman 12” BS with a blade averaging 1/8”-1/4” for primarily small cuts and curves and a 1938 Craftsman 16” BS with a 3/4” 3 tpi (teeth per inch) blade for straight cuts and resawing. I can cut up to a 10” piece of hardwood (very slowly) on the saw.
As for your shop a good starter would be a Rikon 10” with a 3/8” tip blade that probably could do up to 6” cuts. From there you could go up to a 12”/14” Jet, Laguna or Powermatic that can cut up to 8” boards. Of course, if your patient and have an affinity for old tools the options expand exponentially.
are you cutting hardwood or softwood, green or kiln dry? What is your preferable cut size?
I’ll let others expound on my suggestions.