How can I require customers to select a delivery rate before checkout?

[Partylogue]

I deliver party props to hotels (customers are guests at these hotels), the whole area is mostly in the same zip code, but I have delivery rates to the different areas (depending on how far/complicated it is to get there). None of the delivery apps seem to work because I want to make it easy for the customer to see the whole list of Hotels to choose and select their specific delivery price. 

Is there a way I can make a product mandatory before checkout? So that customers HAVE TO select a delivery rate from that list before they checkout? 
Is there another way to approach this? 
Thank you in advance!

[gr_trading]

Hi @Partylogue ,

There is some issue in implementing the delivery rates as users can select multiple hotels in the cart in that case which delivery rates will be applicable. 

The best approach would be to implement delivery rates at the hotel level and yes this can be done using custom code in the theme.