? I want to save the models - that the player placed - when they leave. I'm a bit confused how

Here is my script:

Data = game:GetService("DataStoreService"):GetDataStore("BlastOffMoonData")
JSON = game:GetService("HttpService")
local base
local corner
game.Players.PlayerAdded:connect(function(Player)

    repeat wait() until Player.Character

    repeat wait() until workspace.TestTycoon.Owner.Value ~= ''

    if workspace.TestTycoon.Owner.Value == Player.Name then
        Tycoon = workspace.TestTycoon
        base = Tycoon.Base
        corner = Tycoon.Base.Position - (Tycoon.Base.Size/3)
    end
    local plrData = Data:GetAsync(Player.UserId)
    if plrData then 
        print(JSON:JSONEncode(plrData))
        Player.Money.Value = tonumber(plrData.Money)
        for i, Object in pairs(game:GetService("ReplicatedStorage").GameItems:GetChildren()) do
            for e, Data in pairs(plrData) do
                if Object.Name == Data[1] then
                    local newObject = Object:Clone()
                    newObject.Parent =  Tycoon.TestItems
                    local location =tonumber(Data[2],Data[3],Data[4])
                    newObject:SetPrimaryPartCFrame(CFrame.new(Data[2], Data[3], Data[4]))
                end
            end
        end
    end
end)

The player removing save part:

game.Players.PlayerRemoving:connect(function(plr)

    local playerData = {
    Money = plr.Money.Value,
    Placed = {["itemPositions"] = {} }
    }
    if plr.leaderstats.SandboxSlot.Value == 'Sandbox1' then
        Tycoon = workspace.TestTycoon
    end
    for i, v in pairs(Tycoon.TestItems:GetChildren()) do
        if v:IsA('Model') then
            table.insert(playerData, {v.Name, v.PrimaryPart.Position.x,v.PrimaryPart.Position.y, v.PrimaryPart.Position.z})
        end
    end
    print( JSON:JSONEncode( playerData ) )
    Data:SetAsync(plr.UserId, playerData)

end)