RVN Rig build tips

Hi looking at building an rvn rig of 5 cards this is my buy list

ASRock B450 Steel Legend AMD Motherboard

Antec Signature 1300w x1 PSU

Corsair vengeance LPX 8GB ram stick

Ryzen 3 1200, 3.1Ghz

and finally 5 Palit RTX 3060 Ti Dual 8Gb GDDR6, LHR

I can get the other bits from old parts but with GPUS and PSU ill be spending around-

£3,000/£3.500 depends on the GPU prices.

I worked out I will get around 26-28 mh/s with x5 = 130/140mh/s with a power of 950watts

​

What do you guys think? Will this be fine to build? just trying to get as much info as possible