2 2 2Individual installations can be upgraded multiple times. You have to walk out of range and back in a few times to get the prompts to upgrade further. Easiest done on Walls because it costs the least. Could you include the cost of each upgrade for the wall installation. When done I will leave + feedbackPosted on 06 Oct 14 at 05:38 Head right into building at the start and collect both cases. Now that you have enough cash head to the wall installation and select upgrade. This is the cheapest item to upgrade and shouldn't take you too long earning enough cash to upgrade it fully.1st - $1002nd - $8003rd - $2000Posted by MICSHA303 on 23 Nov 14 at 18:58 Leave a comment