SIPs enable you to invest in smaller amounts at regular intervals (daily, monthly or quarterly). This in turn reduces your burden of defraying a lump-sum - at one go - from your bank account.
If you cannot invest Rs 5,000 in one shot, that's not a huge stumbling block, you can simply take the SIP route and trigger the mutual fund investment with as low as Rs 250 per month.
Source: https://www.personalfn.com/knowledge-center/mutual-funds/tutorials/17-05-30/all_you_need_to_know_about_sips.aspx