No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
Do you see yourself being able to pay it all off within a year? If not, then a credit card probably is not the best form of financing.
You can get a credit card with a 0% intro APR and that's actually a great way to take care of short term debt, i.e. over less than a year. However, most cards have their real APR kick in after a year or 15 months or so. Once that happens, you'll likely be paying around 20% interest on that debt, which is a terrible rate long term.
Also, it's uncommon to get approved for $20K right out of the gate. You can't usually specify how much of a limit you want when you apply, so it's a roll of the dice whether you'll be able to get enough from a card to cover something like that.
If you expect to take more than a year to pay, you're probably better off going with their in-house financing or taking out another installment loan at much lower rate than a credit card would give you.
My wife got approved for USAA card with 0 interest for 15 months with 25k credit limit. However her scores are in the 800s.
Have you considered doing it in stages. DW and I bought our house over 5,000 sq ft and paid cash but the entire house was outdated. We replaced kitchen, bathrooms, pool house before we moved in. Each year we work on atleast one room for a few thousand dollars and pay cash. This year was storm damage year and had to shell out over $10K but did some upgrade work on the rooms being storm repaired at the same time. We did not want big credit card bills for upgrades/updates.
Unless you can get a really good rate on a card, I'd recommend a PELOC instead. NFCU is a good choice (if you can join!) I was able to join based on my job. PenFed may also be an option though they can sometimes be a bit tough. (easier to get in than NFCU)
My wife just applied on line yesterday with PenFed (Membership & Card) according to the PenFed notice her Equifax score was 681, (she also has 10 medical collections) and they just gave her a Rewards Card with a $17,500.00 SL right out of the gate, 0% BT for 12 months. Her other highest other card is a Cap 1 with a $500.00 limit!!
I love Pen Fed...