If you are thinking to buy electric, portable generator you can think of taking bank loan.
To apply for a bank loan you can ask supplier for Quotation of Genset, generator, control panel, wiring charges, installation charges. Submit this quotation to the bank.
When you are planning to buy a commercial or industrial generator it is advised to ask for insurance of the product if available.
If you are planning for buying portable Genset, gasoline Genset, lawn mower, water pumps, solar panel or an multipurpose engine you can search on ecommerce store, now a days there are number of ecommerce website which are selling these kind of products online and you can avail EMI options, you can pay with your credit cards , you can pay cash on delivery some time.