Hardwire VS Mesh

Hello,

I'm fairly tech-savvy, but I'm not an expert. I'm looking into the cost-effectiveness of things as well. I remember when getting my internet set up here, a lot of the coaxial connections weren't giving a signal to the router. 

However, would it be possible to get this fixed and have the network hardwired to my devices upstairs, downstairs, and on my screen porch? Additionally, I would like a way to have a stronger WiFi connection at multiple points for wireless devices including phones and laptops. 

I've looked into Mesh WiFi, I'm just not sure I want to spend money and not have the success that I want. I was thinking if it's possible to just pay to have everything hardwired and multiple router points so at least I'll be more sure it'll provide a good signal.

Thanks for any tips.