5% Sale: 3,449. Orig: $3,630 3yr: $144/mo. 4yr: $160/mo. Down-payment is 1 month's payment on 3yr. or 4yr. RTO - Simple, efficient and effective, Economical Metal buildings will get those storage items out of the weather! 10'x16' with 2 windows. Economical Metal available in standard and side configurations. Side has option for windows. Sizes up to 12'x24'. Made with the quality craftsmanship we have all become accustomed to at Derksen Portable Buildings!