Case Upgrade? due to possible temperature increase

[PCgamerftw]

I am looking online and seen a lot of threads that indicate that the small case contributes to increasing the temperature so I was considering buying a mid tower? Any suggestions? Also is it wise to upgrade the motherboard from a micro considering my build:

Also can anyone tell me how many fans additional fans I can additonial use with this build - I purchased x2 £4.99 coolmaster 120mm fans.

My basket at overclockers uk:

• 1 x AMD Ryzen 5 Six Core 2600 3.90GHz (Socket AM4) Processor - Retail= £149.99
• 1 x Team Group Vulcan T-Force 16GB (2x8GB) DDR4 PC4-24000C16 3000MHz Dual Channel Kit - Grey (TLGD416G30= £99.95
• 1 x CoolerMaster MasterBox Q300L Micro-ATX Case - Black Window= £44.99
• 1 x WD 1TB Blue 7200rpm 64MB Cache Internal Hard Drive (WD10EZEX)= £38.99
• 1 x UD PRO 256GB SSD 2.5" SATA 6GBPS TOSHIBA 3D NAND SOLID STATE DRIVE= £49.99
• 1 x MSI Radeon RX 570 ARMOR OC 8192MB GDDR5 PCI-Express Graphics Card= £158.99
• 1 x Gigabyte B450M-DS3H AMD B450 (Socket AM4) DDR4 Micro-ATX Motherboard= £69.95
• 1 x Bitfenix Formula Series 550W 80 Plus Gold Power Supply= £66.95

 

[PCgamerftw]

I kinda want to have x2 120mm fans on the top of the case and x2 140mm on middle (front) of the case. Would this build support this many fans?