Welcome to the forum, I can't help with your pop top request.
With reference to your conversion, give it some serious thought of what you think you want to what you actually want.
For example, are you happy to cook in the van and potentially have the interior smelling like your local greasy spoon?
If the answer is no, then leave the kitchen out.
Do you really need a wardrobe to hang clothes in when you go away? Or are you happy to live out of the bag?
If it's the latter, then leave this out too.
How many of you will be going away in the van at any given time?
If you end up with a kitchen/units, you'll lose width on the inside, adding to cramped sleeping conditions and potentially your other half given you grief for a crap nights sleep or moaning because they felt you fart on their leg.
I'm only mentioning the above as I have a fully converted van, but never use the inside for sleeping/cooking/hanging clothes etc.
Whenever we go away, we use the awning and use the van as a dumping ground, the only useful thing is the fridge, keeps the beer cold.
If I knew then, what I know now, I wouldn't have gone for a fully converted van, would have saved myself a small fortune if I went for a day van.
Horses for courses and all that.