Honestly I'm not big time or nothing and most of my workers are teens and probably illegals so let me try to keep this as straight to the point as possible without knowing what exactly you are trying to do.
Identify some net 30 accounts grainger (placed the order for equipment and supplies and paid it back within 30 days) was the first one I got. Also Office Depot (home office supplies) and a fuel card (for the mowers, truck)..Make sure you pay on them every month for a few months.
During this time you should have also grabbed your EIN and all of the appropriate articles of business required for your situation to include insurance or expanded home/renters insurance. You will need a business checking account I recommend you get it in the name of the Business unless you are doing the holding company thing.
Either way give it a few months of paying your net 30s-90s and apply for a business credit card you will more than likely need to be a personal guarantor for your company (they run your personal credit and if you don't pay the debt goes on your personal credit). My first business card was with Navy Fed for $3500 and it didn't report smdh. But I was able to get a business card with a local Oklahoma credit union that does report to Experian.
Also don't be afraid to go to the Small business association in your area and check for various programs and different grants. You can also utilize the SBA personal to help you make up a business plan if you want to pitch it for further investing.
I'd start with getting an EIN first, than getting all of the appropriate articles licenses/qualifications, after that apply for a business checking/savings account, set you up a website or online office to include a business phone line, proceed to start compiling net 30s, apply for grants, start using your net 30s/60s/90s. And lastly apply for the credit card.
Also set you up a dun and bradstreet account (a business credit reporting company). Ultimately record keeping is where most people run into issues. Taxes and payroll/operation expenses. If you haven't yet I highly recommend you check in with your local SBA before starting things. They can even help you find what businesses are needed and therefore help with funding.
Actually what kind of business are you trying to open?