cheap build for outside computer

[hobblinharry]

hey my parents have an office that is in a shed outside, we live in the south where it can get very humid. their current PC they have in there is very old and has XP on it so i was considering building them a pc. they use it for their business where the most important program they run is Access.

i came up with: http://pcpartpicker.com/p/7FyrRB but i am looking for feedback on price and parts that will work well under the aforementioned elements. trying to keep it under ~400

 

[Skylarz]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G3220 3.0GHz Dual-Core Processor ($54.00 @ Newegg)
CPU Cooler: Zalman CNPS8900 Quiet CPU Cooler ($26.99 @ Newegg)
Motherboard: ASRock H81M-ITX Mini ITX LGA1150 Motherboard ($65.38 @ Newegg)
Memory: Crucial Ballistix 4GB (1 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Plextor M5S Series 128GB 2.5" Solid State Drive ($69.99 @ Newegg)
Case: Cooler Master Elite 130 Mini ITX Tower Case ($34.99 @ Newegg)
Power Supply: SeaSonic 300W 80+ Bronze Certified ATX Power Supply ($43.98 @ Newegg)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($13.99 @ Newegg)
Total: $336.31
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-07-26 01:02 EDT-0400