Running vSAN Without A vSAN Switch

I have purchased the equipment for an ESX environment using vSAN (two nodes+witness). The issue is the vSAN switch is back ordered. I would like to somehow get this set up for testing (not production obviously) without the VSAN switch.

So I have two scenarios and I would like opinions please:
1. Try and configure vSAN to work through the SFP/fibre connections on the data switches (Cisco 2960) for now and then add the Cisco 3850 vSAN switch when it arrives and move the vSAN network over to that. I don't know if vSAN would even allow this, does it check the port speeds and refuse to work if they are only 1GB?
2. Configure the environment and put the VMs on the local storage on each individual server for now. Obviously this doesn't give us HA. The question is when it comes time to set up the vSAN, will it have to wipe the existing VMs off the local storage?

Maybe there is something else I could do that would be better than these ideas?

Thanks!