3 & a half square or 3 square?

That is today's main question. We are getting a conservatory so that we can have a place to eat without having to make a conscious effort to clear and pull out the table... basically.... but also to make more general space. We have a quote for 3.5 metres square which came to over 10 grand...hmmm.... maybe it is because it is double figures but that is a LOT!

After measuring it and drawing a plan of the garden with that chunk missing (I can't help it, I do it all the time), we realised that it is probably, well almost certainly, too wide for the garden... it's only 4.5 metres wide. 50cm each side is not really enough space.. even for paving slabs never mind my arse!

So leading to the consideration will 3 meters by 3 metres be big enough.... I think we have concluded that it will be and will, hopefully, knock the price down to less that double figures?! Remembering that we will also have to lay a new patio/decking, and get blinds and flooring. Lets hope the mortgage company agree!