Multi channel conversion attribution

If I’m going to use the On-Premise, can I add value more than 90 days in config/config.ini.php?

available_days_prior_to_conversion = 7,30,60,90

Can you recommend reliable hosting for On-Premise setup?

How about cloud hosting with business plan, can I query “Multi channel conversion attribution” report using API with more than 90 days or configure the config/config.ini.php?