I own this tent here.
It is perfectly constructed. You can hang it under a tree for example. You can use one nature stick inside or two sticks outside for example.
There are enough videos about it to watch.
160 € is the price for only the outer tent.
You have a ground sheet. If you don't have to expect a heavy problem with midges, that is enough.
(Or you could buy the very light and very cheap Decathlon Solognac rain poncho as ground sheet to save more weight for example. Or you use for example the ultra light Snugpak Special Forces Bivvy bag, what I usually do.)
This tent is light, but not to fragile.
https://luxeoutdoor.de/de/Sil-Hexpeak-V4a.html
160 € is the price for the outer tent!
Don't misunderstand it!
The seller offers you every piece extra, or all together, because most people don't need the inner tent.
And it is large enough for a man up to 185 cm and a dog.
But if you close it the whole night, you will get condensation inside at the walls too.
Than a bivvy bag would be a good solution, to avoid, that the sleeping bag sucks water from the walls if you touch them.
You have to count with that problem in normal british weather in nearly every 360 degrees closed plastic tent.
I close this tent only in heavy wind or if I leave it on touristic camping grounds.
It is large enough to sleep in it with open entrance, if it rains.
The outer tent is large enough as a two persons tent. Larger versions exist too.
You have to decide:
Heavy cotton or condensation?
Or poncho, tarp or nothing over you and a bivvy bag.
If you aren't to tall, the Six moon designs Gatewood Cape would be a good option. Not ultra cheap, but ultra light and ultra tough. Well known quality stuff!
The Six moon designs serenity mesh tent can be used with it.
That is a poncho you can convert to a tent.
It isn't totally closed till the ground at one side, wich would be the dogs side.
That keeps the condensation problems lower.
In this shop here it is currently sold out, but you will get it somewhere else, if you surch. Surely it will come back at this side very soon.
Here you can think about letting the rain jacket at home. That would save more weight.
Stuff like that is traded second hand too.
You can find it perhaps or sell it later.
I would choose the green one.
It is easyer to hide it in the area!
https://www.sixmoondesigns.com/products/gatewood-cape