The translation on Jisho is: "They have enough capital to build a second factory."
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だけ of course mainly means "only", but it has other meanings.
clause + だけ can mean "to the degree that ～".
On JGram, the following examples are relevant.
This book is certainly worth reading.
(lit. "This book has the value to the extent you read")
I think it's great that you can write Japanese like this. (or: this much, to this extent)