Many gazebos are left as 'showcase' after the original idea faded.

Msia environment are not suited for outdoor dining on regular basis. If one wants to enjoy outdoor dining occasionally, it better and cheaper to pay.

My current place has a patio which came with the house design and can accomodate 10 to 15 people. It was nice initially but as time passes by, we realised is better to dine indoor.

Initially we also wanted to have a gazebo next to the patio and after asking around friends, we decided to drop the idea.

Not trying to derail your idea but sharing what I have gone through since there is no cost to construct the patio. Maybe will box it up one day but on second thought we dont need a big indoor area.

Just a thought, if you're only going to be doing outdoor dining at most once a month, I'd suggest you don't waste resources on it. I too have a corner and gave the idea up during my renovations. Assuming it's an open area, mosquitoes are plenty in the evening, even with fan or anti mozzie repellant. You would always need to clean the area before you dine there. And even without dining, you'd want to keep it clean anyway.

But if you plan to go ahead with it, I'd suggest to increase your budget. Wood decking is nicer. For roofing, I'd opt for clear tempered laminated glass and your gazebo support to use metal I-Beams. That's just me.