Is it worth it to get these to ME 10 or am I better off just starting production at ME 8? Not sure if there is a sweet spot or not. Thank you in advance.
You are going to need to do your own math. Every case is different.
What construction components? T2? ME10/TE20. Capital? ME8 and slowly work towards ME10 as it takes time.
Structure construction components in particular.
ME7-9/TE14-18. The research on those does not take too much time for ME7-8. ME10 takes too much time for very small gains, even ME9 is a ridiculously long 100+ days in a structure.
Take a look what it does to your profitability.
And see how much it costs to do the research in time and isk.