JORDANF97

We are looking at laying tiles

Looking for advice from professionals. Due to cost I am looking at doing my own patio in my garden. Our house came with a very small area all ready paved, we are looking to rip this out and start a fresh with patio covering a length of 10 metres and a width of 3 metres. I have done a lot of research on how to achieve this through watching videos/speaking to others that have experience and I believe i have got my head around how to complete the job. The problem i am having is how to price up what the job will cost in terms of the materials like MOT type 1 , sharp sand , builders sand and cement. For example going off what i have looked up so far i need to dig down enough to allow for the depth of the paving slabs (which is TBC), 50mm for the bed the slabs will lay on and 100mm for the sub base that will be compacted with a vibration plate compactor using MOT type 1. But how do i go about knowing how much KG of MOT Type 1 i will require. This issue is the same with how much KG of sharp sand, and cement / builders sand (working off a 4 to 1 ratio). I am very much a novice with this and have never layed a patio so i am very concerned at over ordering or unordering on materials due to the time frame i have booked off work or potentially having to throw away left over material. Would really appreciate some guidance on helping roughly work this out from professionals that do this day in day out, Thanks in advance!