How do I put unanchored Parts in a tycoon?

I've been working on a game lately which is both a tycoon and fighting game in one. However the game is also team based so anyone can buy buildings for their team. That however is not what I'm troubled with. The buildings are meant to be destructable, so in that case they are needed to be unanchored. Everything is all set and the tycoon button's script has made the building disappear until a Player steps on the button. When someone actually DOES step on the Tycoon button, the whole building falls apart as if there was no studs or inlets. In case if you're wondering, I did weld parts, and put studs and inlets on each part.

Basically, in a shorter way to explain, I unanchored the parts of the building and put it with the Tycoon Button and it's script. After a Player touches the button, the building appears but falls apart even with studs, inlets, and welds.

Here is the Tycoon Button's Script:

-------------------------------------------------------------------------------------------------------------------------
model = script.Parent.Parent.Parent.BlueVHouse
Upgradecost = 5000
teamcolor = BrickColor.new("Bright blue")
-------------------------------------------------------------------------------------------------------------------------

upgradeStuff = model:clone()

model:remove()

enabled = true --debouncer

function onTouched(hit)
	if not enabled then return end
	enabled = false
	local check = hit.Parent:FindFirstChild("Humanoid") --try to find the human that touched the button

	if check ~= nil then --if toucher is a human then to following
		if game.Players:GetPlayerFromCharacter(hit.Parent).TeamColor ~= teamcolor then return end
		local user = game.Players:GetPlayerFromCharacter(hit.Parent) --get player from touching human
		local stats = user:findFirstChild("leaderstats") --Find moneyholder

		if stats ~= nil then --If moneyholder exists then
			local cash = stats:findFirstChild("Cash") --Get Cash
			if cash.Value > (Upgradecost-1) then --If there is enough money then

				cash.Value = cash.Value - Upgradecost --remove cash
				upgradeStuff.Parent = script.Parent.Parent.Parent --put the upgrade into the game
				script.Parent.Parent:remove()

			end
		end
	end
	enabled = true
end


if (script.Parent ~= nil) and (script.Parent.className == "Part") then
	connection = script.Parent.Touched:connect(onTouched)
end